Improvement in jewelersj frosting-tools



Gr.13. FITTZ, J. BAXTER su M. E. ROWE.

YTswelers Frosting-T001.

l lqvE was @s-07 al?, dal y J5 nlaoer, Waron/e .w...4.4.1.1.hunmlllimmwy/IVI N- PETERS. PMOTU-LFTMOGRAFHEH. WASHINGTON. DCy UNITED STATES PATE-NT GFFICE.

GEORGE B. FITTZ, JOHN BAXTER, AND MARK E. BOWE, 0F ATTLEBOROUGH,

i MASSACHUSETTS.

IMPROVEMENT IN JEWELERS FRosTlNG-TooLs.

Specification forming part of Letters Patent No. 217,522, dated July 15,1879; application filed March 27, 1879.

To all whom it may concern:

Beit known that we, GEORGE B. FITTZ, JOHN BAXTER, and MARK E. Rowr., ofAttlehorough, in the county of Bristol and State of Massachusetts, haveinvented a new and valuable Improvement in Jewelers Frosting- Tools 5and we do hereby declare that the following is a full, clear, and exactdescription of p the construction and operation of the same, referencebeing had to the annexed drawings, making a part of this specification,and to the letters and figures of reference marked there on.

Figure l of the drawings is a representation of a side elevation of ourinvention, and Fig. 2 is a vertical section of the device detached fromthe support and-driving-power.

This invention has relation to machines or devices employed for thepurpose of ornamentin g the surface of metals, usually termed frosting;7and the object thereof is to provide a device or machine that can beoperated by any suitable power, whereby the tool or graver can be madeto do its work rapidly, and cover in a short space of time the surfaceof the metal with minute indentations, known in the trade as frostingThe several details of construction and combination of parts will behereinafter described, and subsequently pointed out in the claims.

In the accompanying drawings, A represents a standard, of any suitableform or construction, connected to a base, a. The upper end of thestandard A is formed with a horizontal bifurcated elbow, b,to which ispivoted the bifurcated end c of an arm, B. The bifurcated ends b c, whenplaced together, allow of sufficient space for a double pulley, d, whichis rigidly secured to the spindle e, said spindle also serving as apivot to connect the arm to the standard as well as journals for thepulley. The pulley cl receives a suitable endless belt or otherconnection from the motor or power, by which the pulley is rapidlyrotated, and, by the endless belt or cord f, communicates its motion toa pulley, g, rigidly secured to a spindle, h, having its bearings in thebifnrcated end t of the arm B.

The lower end of the spindle h is secured to the end of a'coiled spring,j, the other end of the spring being secured to socket-head k. The headla has connected thereto a cylindrical shaft, Z, fitting within thesocket in the head, and secured or fastened by a pin, m, passing throughthe head and shaft. This shaft l is formed with an annular shoulder, n,for supporting the iiauged end of ahollow cylinder, C, the lower end ofthe latter having upon its interior screw-threads, for attaching thescrew-threaded end of a sleeve, D, gradually diminishingin circumferencefrom its upper toits lower end. Secured to the shaft lis one end of acoiled spring, o, the other end thereof being secured in any suitablemanner to cylindrical hammer p, the lower end of the hammer tting in acam sleeve or socket, q. This cam sleeve or socket has dowel-pins r uponits lower end, which fit wit-hin small holes in the screw-threaded endof the sleeve D, so that `the socket q is held stationaryl and preventedfrom turning.

The frosting-tool E, upon its lower end, is serrated or formed withseveral small points, for the purpose of producing the fine and minuteindentations upon the surface of the metal. The frosting-tool E passesdown through a central hole in the sleeve D, and has near its npper enda head, s, disposed within an opening or chamber in the screw-threadedend of the sleeve D. Around the frosting-tool Eis placed a small coiledspring, t, between the head s and bottom of the chamber in the sleeve D.Above the head s the tool E extends into a hole formed in the cam-socketq, so that the end of the tool will receive the blow of the hammer p.

The operation of the device is very simple,

requiring little labor to frost pieces of jewelry. By the belt andpulley f g the hammer p is caused to rotate with great rapidity, and thepin u upon the hammer, traversing the incline upon the cam socket duringsuch rotation, gives the hammer a vertical reciprocating motion,striking at intervals the upper end of the frosting-tool E, making uponthe metal the required frosting appearance.

The pivoted arm B allows the tool to be held over a space large enoughto frost any piece of jewelry, and the spring j admits of the tool beingheld at all times in a vertical position, no matter how uneven thesurface of the metal may be; and the small spring t keeps the upper endof the tool in position to be acted upon by the hammer, insuring theperfeet operation of the device, and accomplishr ing its work with greatskill and rapidity.

Having now fully described our invention, whatwe claim as new, anddesire to secure by Letters Paten t, is-

1. The combination, with the hollow cylinder C, shaft Z, spring o, andhammer p, of the removable sleeve D, tool E, and cam-socket q,substantially as and for the purpose set forth.

2. The standard A, having pivoted thereto

